[PATCH] D146357: [X86] Alternative algorithm for vector-vector shifts

[Ivan Chikish via Phabricator via llvm-commits]

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Uses trivial in-lane instructions to avoid expensive cross-lane shuffles. Sometimes prevents using higher YMM/ZMM registers.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D146357

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/X86/avx2-shift.ll
  llvm/test/CodeGen/X86/avx2-vector-shifts.ll
  llvm/test/CodeGen/X86/avx512-shift.ll
  llvm/test/CodeGen/X86/combine-sdiv.ll
  llvm/test/CodeGen/X86/logic-shift.ll
  llvm/test/CodeGen/X86/prefer-avx256-shift.ll
  llvm/test/CodeGen/X86/sshl_sat_vec.ll
  llvm/test/CodeGen/X86/ushl_sat_vec.ll
  llvm/test/CodeGen/X86/vector-fshl-128.ll
  llvm/test/CodeGen/X86/vector-fshl-256.ll
  llvm/test/CodeGen/X86/vector-fshl-512.ll
  llvm/test/CodeGen/X86/vector-fshl-rot-128.ll
  llvm/test/CodeGen/X86/vector-fshl-rot-256.ll
  llvm/test/CodeGen/X86/vector-fshl-rot-512.ll
  llvm/test/CodeGen/X86/vector-fshr-256.ll
  llvm/test/CodeGen/X86/vector-fshr-512.ll
  llvm/test/CodeGen/X86/vector-fshr-rot-128.ll
  llvm/test/CodeGen/X86/vector-fshr-rot-256.ll
  llvm/test/CodeGen/X86/vector-fshr-rot-512.ll
  llvm/test/CodeGen/X86/vector-idiv-sdiv-512.ll
  llvm/test/CodeGen/X86/vector-idiv-udiv-512.ll
  llvm/test/CodeGen/X86/vector-rotate-128.ll
  llvm/test/CodeGen/X86/vector-rotate-256.ll
  llvm/test/CodeGen/X86/vector-rotate-512.ll
  llvm/test/CodeGen/X86/vector-shift-ashr-128.ll
  llvm/test/CodeGen/X86/vector-shift-ashr-256.ll
  llvm/test/CodeGen/X86/vector-shift-ashr-512.ll
  llvm/test/CodeGen/X86/vector-shift-ashr-sub128.ll
  llvm/test/CodeGen/X86/vector-shift-lshr-128.ll
  llvm/test/CodeGen/X86/vector-shift-lshr-256.ll
  llvm/test/CodeGen/X86/vector-shift-lshr-512.ll
  llvm/test/CodeGen/X86/vector-shift-lshr-sub128.ll
  llvm/test/CodeGen/X86/vector-shift-shl-128.ll
  llvm/test/CodeGen/X86/vector-shift-shl-256.ll
  llvm/test/CodeGen/X86/vector-shift-shl-512.ll
  llvm/test/CodeGen/X86/vector-shift-shl-sub128.ll
  llvm/test/CodeGen/X86/vector-shuffle-256-v16.ll

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